Questions - OpenCV Q&A Forum

113k

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6

answers

14

votes

2014-09-25 12:02:22 -0500 lvv

What is the most effective way to access cv::Mat elements in a loop?

50k

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2

answers

13

votes

2019-02-22 04:30:42 -0500 hunter3

How to get and modify the pixel of Mat in Java?

39k

views

1

answer

9

votes

2013-11-03 09:19:07 -0500 Jose Luis Blanco

Any way to convert IplImage* to cv::Mat in OpenCV 3.0.0?

IplImage
Mat

1k

views

2

answers

8

votes

2016-02-18 21:50:13 -0500 sturkmen

Best practices for writing image processing functions?

68k

views

2

answers

7

votes

2012-10-31 21:29:11 -0500 unxnut

subtract from white - invert

15k

views

4

answers

6

votes

2013-10-17 01:42:12 -0500 Michael Burdinov

Best way to apply a function to each element of Mat.

10k

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1

answer

5

votes

2015-09-16 18:14:45 -0500 sturkmen

How to read the pixels of the three channels at the same time?

231

views

2

answers

5

votes

2012-09-13 05:09:27 -0500 Michael Burdinov

Can I perform nested operations with the Mat object?

Mat

1k

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3

answers

5

votes

2014-10-09 01:53:13 -0500 xhpohanka

Missing Mat::zeros(int ndims, const int* sz, int type)

80k

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1

answer

5

votes

2013-03-29 10:05:41 -0500 StevenPuttemans

set ROI in cv::Mat

36k

views

2

answers

5

votes

2013-05-28 05:28:06 -0500 Jawaher Khemakhem

converting from iplimage to cvmat and vise versa

1k

views

no

answers

5

votes

2015-07-14 05:00:54 -0500 mkc

Is there a reason why OpenCV does not support (CV_32U) 32 bit depth unsigned integer Mat?

58k

views

4

answers

4

votes

2012-12-05 07:11:04 -0500 wuling

Mat to byte array

opencv
Mat

10k

views

2

answers

4

votes

2013-02-28 02:30:23 -0500 SR

Using external image data in a cv::Mat

Mat
pointer

1k

views

1

answer

4

votes

2015-04-03 18:01:12 -0500 Guanta

Why some basic operations with cv::Mat with number of channels > 4 do not work ?

11k

views

2

answers

3

votes

2013-09-23 05:47:22 -0500 StevenPuttemans

How to convert cv::Mat to std::string?

16k

views

2

answers

3

votes

2012-07-12 22:40:21 -0500 Niu ZhiHeng

How to add 2 Mat objects of different type?

c++
Mat

1k

views

1

answer

3

votes

2012-07-19 06:49:54 -0500 sammy

Is there penalty for reference counting in Mat?

3k

views

1

answer

3

votes

2012-10-31 14:41:51 -0500 Maria Dimashova

convert from vector to Mat

66k

views

2

answers

3

votes

2012-11-21 20:11:39 -0500 Martin Peris

How to create a binary image mat?

13k

views

5

answers

3

votes

2018-08-09 05:23:41 -0500 sturkmen

cv::Mat serialization to binary file

2k

views

2

answers

3

votes

2013-05-30 03:22:08 -0500 berak

How to know if two Mat point to the same data?

43k

views

1

answer

3

votes

2013-07-09 02:27:57 -0500 jbseano

How to use Mat.at<Internal type>(i,j)?

Mat
at

274

views

1

answer

3

votes

2013-12-02 07:14:20 -0500 Michael Burdinov

Do we need to optimize matrix operation of cv::Mat?

2k

views

1

answer

2

votes

2012-09-04 04:48:58 -0500 Vladislav Vinogradov

Mat element access

4k

views

1

answer

2

votes

2012-09-04 10:19:25 -0500 Andrey Pavlenko

How to update Mat with multiple channels?

android
Mat

320

views

1

answer

2

votes

2012-09-05 03:56:59 -0500 Vladislav Vinogradov

Video element access

317

views

1

answer

2

votes

2012-09-14 01:57:34 -0500 Andrey Pavlenko

Why is my call to putText creating a wavy image of lines?

8k

views

2

answers

2

votes

2013-03-11 05:53:09 -0500 Andrey Pavlenko

Convert Mat to MatOfByte in Android

1k

views

no

answers

2

votes

2012-10-12 01:57:47 -0500 Harsha

How to display 3D images in openCV

3d
Mat

484 questions

What is the most effective way to access cv::Mat elements in a loop?

How to get and modify the pixel of Mat in Java?

Any way to convert IplImage* to cv::Mat in OpenCV 3.0.0?

Best practices for writing image processing functions?

subtract from white - invert

Best way to apply a function to each element of Mat.

How to read the pixels of the three channels at the same time?

Can I perform nested operations with the Mat object?

Missing Mat::zeros(int ndims, const int* sz, int type)

set ROI in cv::Mat

converting from iplimage to cvmat and vise versa

Is there a reason why OpenCV does not support (CV_32U) 32 bit depth unsigned integer Mat?

Mat to byte array

Using external image data in a cv::Mat

Why some basic operations with cv::Mat with number of channels > 4 do not work ?

How to convert cv::Mat to std::string?

How to add 2 Mat objects of different type?

Is there penalty for reference counting in Mat?

convert from vector to Mat

How to create a binary image mat?

cv::Mat serialization to binary file

How to know if two Mat point to the same data?

How to use Mat.at<Internal type>(i,j)?

Do we need to optimize matrix operation of cv::Mat?

Mat element access

How to update Mat with multiple channels?

Video element access

Why is my call to putText creating a wavy image of lines?

Convert Mat to MatOfByte in Android

How to display 3D images in openCV

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